US476733A - Galvanic battery - Google Patents

Description

r 2 sheets -sneen 1. M. M. CLARK.

GALVANIG BATTERY.

No. 476,733. Patented June 7, 1892.

{I I i (No Model.) 2 Sheets-Sheet 2 M. M. CLARK.

GALVANIG BATTERY. No. 476,733. Patented June 7, 1892.

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MARTIN M. CLARK, OF CHICAGO, ILLINOIS.

GALVAN lC BATTERY.

SPECIFICATION forming part of Letters Patent No. 476,733, dated June 7, 1892. Application filed December 26, 1888. Serial No. 294,602. (No model.)

To aZZ whom it may concern:

Be it known that I, MARTIN M. CLARK, a citizen of the United States, residing at Chi cago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Carbon Batteries, (Case No. 5,) of which the following is a full, clear, eoncise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to galvanic batteries in which a zinc rod and carbon plates are used as elements, these being placed in a solution of sal-ammoniac.

My invention consists in the manner of mounting the carbon plates in the lead head or cover, in providing a lead binding-post upon the cover, in a wooden ring or collar for supporting the lead head upon the jar, and in the manner of supporting the zinc rod at the center of the carbon plates, as hereinafter described.

My invention is illustrated in the accompanying drawings, in which- Figure 1 is perspective view of aeell of battery embodying my invention. Fig. 2 is a vertical central sectional view through the lead head and the carbon plates, showing the manner of suspending the plates and the zinc rod therefrom and the construction of the lead binding-post. Fig. 3 is a detailed view show ing the manner of casting acarbon plate into the lead head. Fig. 4 is a plan of the wooden ring which is placed upon the top of the glass jar and serves as a support for the lead head.

Like parts are indicated by similar letters of reference throughout the different figures.

The glass jarais of the form now used with Leclanch batteries. The wooden ring I; is fitted to the top of the jar and is provided with a seat Z) for the lead head 0, the head and the ring when in position, as shown in Fig. l, forming the cover of the jar.

I preferably use four carbon plates d. These carbon plates are slotted at the top and are cast into the lead head, preferably as shown in Figs. 2 and 3. The zinc rod 6 is suspended from the center of the head, being insulated therefrom by the wooden bushing f. An elastic rubber collar 9, placed upon the zinc rod, serves as a stop to hold the rod suspended at any height required. The rubber piece It upon the lower portion of the rod keeps the rod always separated from the carbon plates. The usual binding-post i is provided in the upper end of the rod 6. Projecting from the upper surface of the lead head is provided the nip ple 7c. The nut Z, placed thereon, is composed principally of lead, being hardened, however, by tin or bismuth, so as to prevent the thread of the screw from stripping when turned onto the projection 70. The binding post thus formed upon the lead head, which connects with the negative element, will not be sub ject to chemical action, as is the case when brass is used as a part of the binding-post, as has been usual heretofore.

The carbon plates are preferably annealed and perforated, as shown, in order to make as much surface as possible. The wooden ring, as well as the wooden bushing, I preferably boil in paraffine. The wood is thus saturated with paraftlne, in order that the insulating properties thereof may be improved. The paraiiine also prevents the wood from warping or being otherwise injuriously affected. The lead head, as well as the wooden ring, I cover with japan as a protection against the salts which sometimes creep up to the lead. The ring, however, serves as additional protection to the lead against the salt, since the lead is removed from the edge of the glass jar by the width of the ring. The salt will not creep across the wood as readily as across glass. Hence the lead head is better proteeted than would be the case if the lead head were made large enough to rest upon the glass.

Having thus described my invention, I claim as new and desire to secure by Letters Patent-- 1. The combination, with the glass jar, of the wooden ring placed thereon, the lead head resting upon the wooden ring, the carbon ele ments supported by said lead head and being cast therein, the zinc element placed within the carbon elements and centrally suspended from the lead head, a wooden paraffined bushing surrounding the zinc element to insulate the same from the lead, the projection on the lead head and the hardened lead nut placed on said projection, substantially as and for the purpose specified.

2. The combination, with the jar, of the lead head and the four carbon plates or elements cast therein, said head being provided with a central opening and bushing placed in said opening, the zinc rod inserted through said bushing, an adjustable stop upon said zinc rod, which stop rests against thebushing, and a rubber piece upon the lower portion of the rod for separating the same from the carbon plates, and the Wooden ring fitted to the upper edge of the jar upon which the lead head rests, substantially as and for the purpose specified.

3. The negative element composed of carbon plates, in combination with a lead head, in which head the said carbon plates are cast, a lead binding-post provided upon said head,

In witness whereof I hereunto subscribe my 2 5 name this 6th day of December, A. D. 1888.

MARTIN M. CLARK. Witnesses:

GEORGE P. BARTON, CHAS. G. HAWLEY.

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